Square mailbag. A reader who prefers to remain anonymous writes in response to yesterday’s edition: “Many, many people take hydroxychloroquine for immune-related disorders on a daily basis. Personally, I’ve had it prescribed to me a number of times over the last 30 years and I’m happy to say I’m still alive and kickin’. Many medications have side-effects that may cause irreversible damage or be possibly fatal. You want to be careful how much and for how long you take acetaminophen for example. The emphasis on the word fatal in today’s email isn’t appropriate and needs to be re-examined. … It’s one thing to state it may not be of value to people seriously affected by the coronavirus; it’s another to imply people are taking their life in their hands. That risk exists with any medication and has to be assessed by both the medical provider and the patient.”■Thanks, Mike Braden, for the reminder that appositive phrases take two commas.